nonlinearityn.非线性nonlinearadj.非线性的nonlinear PCA cfitefion非线性PCA准则nonlinear ware equation非线性波动方程Nonlinear equations set非线性方程组nonlinear wave-motion非线性波动Nonlinear servo-motor非线性电动机nonlinearity of voltage电压非线性nonlinear preprocessing非线性预处理nonlinear wave equation非线性波动方程nonlinear perturbations非线性扰动nonlinear least squares非线性最小二乘